Community of snails (Mollusca, Gastropoda) of the Sutla River backwater

Zrinščak, Ivana (2014) Community of snails (Mollusca, Gastropoda) of the Sutla River backwater. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The main objective of this study was to determine the composition and structure of snail communities of the Sutla River backwater. The backwater is made up of two pools, one with transparent water and well-developed submerged macrophytes, while the other pool was without submersed macrophytes, with muddy water. The survey was conducted from July to September 2012 and from May to October 2013. A total of 10 snail species was found during the study. Increased abundance of snails was found in a pool of developed macrophytes and species with the highest abundance was Gyraulus laevis. The analysis of growth structure showed that younger individuals prevail in spring and summer while adult individuals prevail in autumn. This indicates that the process of spawning takes place in spring and summer. Analysis of snails functional feeding guilds showed that dominated group was scrapers, followed by grazers. Results of this study indicate that submersed macrophytes represent a significant micro-habitat for snails by serving them as a shelter from predators and fouling of macrophytes is an important source of food.

Item Type: Thesis (Diploma thesis)
Keywords: mollucs, macrophyte, abundance, growth structure, functional feeding guilds
Supervisor: Lajtner, Jasna
Date: 2014
Number of Pages: 47
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 25 Nov 2014 13:00
Last Modified: 25 Nov 2014 13:00
URI: http://digre.pmf.unizg.hr/id/eprint/3373

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